Download the "Platform Tools" zip file from the official Android Developers website. Extract it to a folder on your C: drive (e.g., C:\Platform-Tools ).
Sometimes a bad cache causes a bootloop. Try wiping it first: fastboot erase cache How to Unbrick ZTE Blade A55
If you have the stock firmware extracted on your PC, look for a file named boot.img inside the firmware folder. Run the command: fastboot flash boot boot.img Download the "Platform Tools" zip file from the
If you see a serial number followed by "fastboot," your computer recognizes the phone. If you see nothing, you need to install ZTE USB Drivers. How to Unbrick ZTE Blade A55